Board joiner



Feb. 9 1926.

C. J. EISCHEN BOARD JOINER Filed April 25,

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Patented Feb. 9, 1926.

UN l 'l EU "l'A 'l ES CHARLE$ J. EISCH'EN, 036 LOS ANGELES, CALIFORNIA.

BOARD JOINEB.

Application filed April To all QU/LUHZ it may concern:

Be it known that 1, CHARLES J. Eiscrrnn, a citizen of the United States residing at Les A. g s, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Board Joiners, of which the following is a specification.

This invention relates to a device which is especially, but not necessarily, designed for connecting or joining the ends of boards together.

It is my object to provide a device of this kind which is especially useful for affording a quick detachable connection between the meeting ends of boards used in making a concrete mold or forum-which is extensively employed in the building trades.

Ordinarily, studs beams and other frame work is provided, upon which the boards are temporarily nailed, and after the coir crcte filler has set, the form is literally knocked down by extracting the nails or by sawing oil the ends of the boards. This results in considerable waste of lumber and time. I therefore propose an exceedingly simple and inexpei'lsive device for joining the meeting ends oi' two boards together and for connecting the joined ends with the two boards above and below, thus providing a tour way connection which absolutely prcvents bulging and displacement ol the board and makes for an accurate mold.

Other features and advantages of the improved device will become apparent from the following description and drawings.

In the acr'mmpanying drawing, forming a part of this application, and 'in which like ninnerals are employed to designate like parts tl'ironghout the same:

Figure l is a side elevation of a portion or a concrete form, showing a plurality of the joiners or connectors in position.

Figure it is a central longitudinal section, on an enlarged scale through one of the coin nectors.

Figure 25 is a side elevation of the same.

Figures -iland 5 are longitudinal sections through the two members employed in the make up of each device, the members being disconnected from each other.

Figure 6 is an enlarged detail section, taken approximately upon the line 66 of Figure 1. v

The joiner is generally indicated by numeral 1, and in practice it may be made ,.1925. Serial No. 25,530.

from a metal stamping, castingor the like. Broadly construed, the joiner embodies a pair of channels 2 the adjacent ends of a pair of boards and 5. .It will be noted that the device of a length greater than the width of the board and therefore the end portions project be yond the top and bottom edges of the boards and engage with the boards 6 and 7 so as to provides substantial four-way connection.

lVhile the device may be cast or otherwise made and accomplish this result, it is pref crably composed of pair oi channel shaped members 8- and 9. From Figure 5 it will be seen that the bottom 10 of the member 9 has its ends tern'iinating in spaced relation from the ends of the side flanges. The bottom 11 of thecomplemental member 8, however, has its ends extended to provide a flexible connecting post 12. The two bottoms are brought together as indicated in Figure 2- and the tongues are bent over and around the ends of the bottom to connect the two members together. This provides the aforesaid ehannels 2 and 3, and allows these chainncls to torn'iinatc inwardly from the upper and lower ends so that these extended end portions 14- may lit over the adjacent l011gitudinal edges of the boards 6 and 7, as indicated in Figure 1. The bottoms 10 and 11 are provided with registering holes 15, and these holes are adapted to permit passage of a carrying wire, rod or the like theret-llrough. By this arrangement, a number of the devices may be strung upon a Wire and carried to an elevation on a building where a form is to be erected. They may be pulled off of the wires one by one to place them in position. This will greatly facilitate handling and. will prevent loss and it is therefore obvious that devices of this kind will last indefinitely.

In order that a proper construction may be placed upon the following claims, the channels 2. and 3 into which the ends of the boards 4: and 5 are to be received, are con sidered as terminating in spaced relation from the upper and lower ends of the devices. These channels are of a length and width equal to the boards and the portions extending beyond the opposite ends of the channels fit snugly upon the opposed longitudinal edges of the two boards 6 and 7 extending across the joint. This is mentioned especially because the gist of the invention and 3 for reception of resides more particularly in the four-way connection thus provided. 7

It is thought that persons familiar with devices of this class will doubtless appreciate the practicability and utility of a device of this kind, and that they will be able to obtain a clear understanding of the invention from the description and drawing. For this reason, a'more lengthy description will not be entered.

VJhile the preferred embodiment of the invention has been shown and described, it is to be under tood that changes coming within the field of invention may be resorted to.

I claim:

1. In a concrete form wall, a plurality of boards arranged in end to end and edge to edge relation, the vertical end joints being disposed in staggered relation, and means for connecting the meeting ends of a pair of boards together, said means being interposed between the ends of said pair and having connection with the intermediate poi= tion of the adjacent top and bottom boards extending across the joints.

2. In a board wall for a concrete form, a pair of horizontally aligned boards, and a board above and aboard below said pair having the intermediate portion extending across the joint existing between the adjacent ends of said pair, and a board joiner located between said adjacent ends, said joiner having a channel on each side for reception of the last named ends and having portions at its top and bottom extending beyond said channels and engaged with said second named boards to provide a substantial tour way connection.

3. in a board joiner, a pair of members of channel shaped cross section, one of said members having its bottom wall terminating in spaced relation fromithe ends of the side walls, the complemental member having its bottom wall provided at its ends with extensions, said bottom walls being arranged together and said end extensions being bent over and around the first named bottom wall to connect the mem'ei's together.

In testimony whereof I aflix my signature.

CHARLES J. EISGHEN. 

